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Magnesiohulsite

Formula:
(Mg,Fe
2+
 
)
 
2
(Fe
3+
 
,Sn,Mg)[O
 
2
|BO
 
3
]
System:MonoclinicColour:Black, bluish-grey, ...
Hardness:6


The magnesium analogue of Hulsite and the Fe3+ analogue of Alumino-Magnesiohulsite.

Classification of Magnesiohulsite

IMA status:Approved 1983
Strunz 8th edition ID:5/G.03-30
Nickel-Strunz 10th (pending) edition ID:6.AB.45

6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
Dana 8th edition ID:24.2.3.2

24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
Hey's CIM Ref.:9.6.5

9 : Borates
6 : Borates of Ti, Sn and Ta
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Type Occurrence of Magnesiohulsite

Type Locality:Qiliping Sn-Fe deposit, Dayi Mt. (Dayishan), Changning Co., Hengyang Prefecture, Hunan Province, China
Year of Discovery:1985

Physical Properties of Magnesiohulsite

Colour:Black, bluish-grey, greyish white in reflect light.
Hardness (Mohs):6

Crystallography of Magnesiohulsite

Crystal System:Monoclinic
Cell Parameters:a = 10.7Å, b = 3.06Å, c = 5.45Å
β = 94.6°
Ratio:a:b:c = 3.497 : 1 : 1.781
Unit Cell Volume:V 177.87 ų (Calculated from Unit Cell)

Optical Data of Magnesiohulsite

Type:Biaxial
RI values: nα = 1.880 nγ = 1.950
Maximum Birefringence:δ = 0.070

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong

Chemical Properties of Magnesiohulsite

Formula:
(Mg,Fe
2+
 
)
 
2
(Fe
3+
 
,Sn,Mg)[O
 
2
|BO
 
3
]
Essential elements:B, Fe, Mg, O
All elements listed in formula:B, Fe, Mg, O, Sn

Relationship of Magnesiohulsite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.AB.05Hambergite
Be
 
2
[O|OH|BO
 
2
]
6.AB.10Berborite
Be
 
2
[(OH,F)|BO
 
3
] · H
 
2
O
6.AB.15Jeremejevite
Al
 
6
[(F,OH)
 
3
|(BO
 
3
)
 
5
]
6.AB.20Warwickite
(Mg,Fe
2+
 
)
 
3
Ti[O|BO
 
3
]
 
2
6.AB.20Yuanfuliite
Mg(Fe
3+
 
,Fe
2+
 
,Al,Ti,Mg)[O|BO
 
3
]
6.AB.25Karlite
Mg
 
7
[(OH,Cl)
 
5
|(BO
 
3
)
 
3
]
6.AB.30Azoproite
(Mg,Fe
2+
 
)
 
2
(Fe
3+
 
,Ti,Mg)[O
 
2
|BO
 
3
]
6.AB.30Bonaccordite
Ni
 
2
Fe
3+
 
[O
 
2
|BO
 
3
]
6.AB.30Fredrikssonite
Mg
 
2
(Mn
3+
 
,Fe
3+
 
)[O
 
2
|BO
 
3
]
6.AB.30Ludwigite
Mg
 
2
Fe
3+
 
[O
 
2
|BO
 
3
]
6.AB.30Vonsenite
Fe
2+
2
Fe
3+
 
[O
 
2
|BO
 
3
]
6.AB.35Pinakiolite
(Mg,Mn
2+
 
)
 
2
Mn
3+
 
[O
 
2
|BO
 
3
]
6.AB.40Blatterite
(Mn
2+
 
,Mg)
 
2
(Mn
3+
 
,Sb
3+
 
,Fe
3+
 
)[O
 
2
|BO
 
3
]
6.AB.40Chestermanite
Mg
 
2
(Fe
3+
 
,Mn
3+
 
,Al,Sb
3+
 
)[O
 
2
|BO
 
3
]
6.AB.40Orthopinakiolite
(Mg,Mn
2+
 
)
 
2
Mn
3+
 
[O
 
2
|BO
 
3
]
6.AB.40Takéuchiite
(Mg,Mn
2+
 
)
 
2
(Mn
3+
 
,Fe
3+
 
)[O
 
2
|BO
 
3
]
6.AB.45Hulsite
(Fe
2+
 
,Mg)
 
2
(Fe
3+
 
,Sn)[O
 
2
|BO
 
3
]
6.AB.45Aluminomagnesiohulsite
(Mg,Fe
2+
 
)
 
2
(Al,Mg,Sn)[O
 
2
|BO
 
3
]
6.AB.50Fluoborite
Mg
 
3
[(F,OH)
 
3
|BO
 
3
]
6.AB.50Hydroxylborite
Mg
 
3
(BO
 
3
)(OH)
 
3
6.AB.55Shabynite
Mg
 
5
[(Cl,OH)
 
2
|(OH)
 
5
|BO
 
3
] · 4H
 
2
O
6.AB.55Wightmanite
Mg
 
5
[O|(OH)
 
5
|BO
 
3
] · 2H
 
2
O
6.AB.60Gaudefroyite
Ca
 
4
Mn
3+
2-3
[(O,OH)
 
3
|CO
 
3
|(BO
 
3
)
 
3
]
6.AB.65Sakhaite
Ca
 
12
Mg
 
4
[Cl|(OH)
 
2
|(CO
 
3
)
 
4
|(BO
 
3
)
 
7
]
6.AB.70Harkerite
Ca
 
24
Mg
 
8
Al
 
2
Si
 
8
(O,OH)
 
32
(BO
 
3
)
 
8
(CO
 
3
)
 
8
(H
 
2
O,Cl)
6.AB.75Pertsevite
Mg
 
2
BO
 
3
(F,OH)
6.AB.75IMA2008-060
Mg
 
2
(BO
 
3
)(OH)
6.AB.80Jacquesdietrichite
Cu
 
2
BO(OH)
 
2
(OH)
 
3
6.AB.85Painite
CaZrAl
 
9
[O
 
15
|BO
 
3
]
Related Minerals - Hey's Index Grouping:

- +
9.6.1Warwickite
(Mg,Fe
2+
 
)
 
3
Ti[O|BO
 
3
]
 
2
9.6.2Azoproite
(Mg,Fe
2+
 
)
 
2
(Fe
3+
 
,Ti,Mg)[O
 
2
|BO
 
3
]
9.6.3Nordenskiöldine
CaSn
4+
 
[BO
 
3
]
 
2
9.6.4Hulsite
(Fe
2+
 
,Mg)
 
2
(Fe
3+
 
,Sn)[O
 
2
|BO
 
3
]
9.6.6Behierite
(Ta
5+
 
,Nb
5+
 
)[BO
 
4
]

Other Names for Magnesiohulsite

Synonyms:
IMA1983-074
Other Languages:
German:Magnesiohulsit
Russian:Магнезиогулцит
Spanish:Magnesiohulsita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Magnesiohulsite

Reference List:Yang Guangming, Peng Zhizhong, and Pan Zhaolu (1985): Magnesiohulsite - A new tin-rich borate mineral. Acta Mineralogica Sinica 5(2), 97-101 (in Chinese with English abstract). - American Mineralogist (1988), 73, 929 (abstract).

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Magnesiohulsite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Magnesiohulsite in the Natural History Museum (London) online catalogue
  • Magnesiohulsite details from Handbook of Mineralogy (PDF)
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    Localities for Magnesiohulsite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    China
     
    • Hunan Province
      • Hengyang Prefecture
        • Changning Co.
          • Dayi Mt. (Dayishan)
    		Yang Guangming, Peng Zhizhong, and Pan Zhaolu (1985): Magnesiohulsite - A new tin-rich borate mineral. Acta Mineralogica Sinica 5(2), 97-101.
    Russia
     
    • Far-Eastern Region
      • Chukotskii Autonomous Okrug
    Mineral and/or Locality
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